THE official topic of today’s discussion is: “Should conservatives support same-sex marriage?” The unofficial subtitle, at least of my talk, is: “Everything I Know About Gay Marriage, I Learned at the American Enterprise Institute.” Though I’m now at the Brookings Institution, my first think tank appointment was at AEI. It was here as a guest scholar that I learned so much from so many of the leading lights of conservatism, and I’d like to think that many of my arguments for gay marriage are, in fact, conservative arguments.